Stropping device.



Patented June 8, 1909.

JOHN SOHNURR, OF ROCHESTER, NEW YORK.

s'rnorrme DEVICE.

Specification of Letters Patent.

Application filed August 3, 1908. Serial No. 6,631.

Patented June 8, 1909.

To all whom it may concern:

Beit known that 1, JOHN SGHNURR, of Rochester, inthe county of Monroe and State of New York, have invented a new and '-useful Improvement in Stropping Devices,

which improvement is fully set forth in the following specification and shown in the accompanying drawings.

This invention relates to certain new and useful improvements in stropping devices of that general character designedto hold the blade, such as the safety razor type, and

by reciprocation of the device over a strop automatically turn the blade so thatfirst one edge and thenthe other is subjected to abrasion and thereby sharpened.

The present invention has for its objects among others to provide a simple and improved device of this nature, of few parts,

those readily assembled, and eflicient in operation and not liable-to get out of order or injured. The construction is such that the blade being sharpened may bedrawnslightly diagonally over the strop so as to give the blade a sort of draw-slide along the strop, msnrmg a keen edge.

' Other objects and advantages of the invention will hereinafter appear and the novel features thereof will bespecifically defined by the appended claims.

.The invention, in its preferred form, is

clearly illustrated in the accompanying drawings, which, with, the numerals of refer the application of the invention. "a substantially: central longitudinal section through the stropping device, as on the line 2-2 of Fig. 1. Fig. 3 is a perspective viewence marked thereon, form' a part of this specification, and in which- Figure 1 is a-perspectivcview showing Fig.2 is

of the blade-holder removed with the blade therein. Fig.4 is a perspective view showing the parts of the blade holder, and-the blade, separated, but in their relative positions. Fig. 5 is a perspective view of one of the tumblers. Fig. 6 is a perspective view of a holder for a one-edge blade. with a blade therein. Fig. 7 is a perspective of the parts in Fig. 6 separated, but in their relative positions.

Like numerals of reference indicate like parts throughout the several views.

Referring tothe drawings 1 designates the,

frame of theldevice; this may of any suitable form; of construction, that herein thereto in any suitable way.

A suitable handle is provided; in this instance it is shown as formed by the angularly disposed bars 4 4 secured atone end to the ends of one of the frame members 2 in any suitable manner, as upon the ends of the transverse rods or. bars 3, the ends of the two bars -'l then being brought together and parallel with each' other and received and securely held within a tubular portion 5 to be grasped by-the hand in operating the device. The divergent members 4 4 may be in one piece doubled at the center and the doubled portion received within the tubular member 5 if found more convtmiont or practicable. I t is to be understood. however. that other forms of construction of frame and handle maybe employed without affecting the operation of the other parts. now to be described, and which constitute the gist of my 'present invention.

Near each end of the frame is a tumbler in the form of a roller 6, having at each end a. pintle or pin 7 which are loosely received in openings in the members 2 of the frame so as to turn freely therein. Each of these .tumblers has at one end an arm 8 extending at right angles to the length of the tumbler as seen best in Fig; 5, and the free end of this arm is provided with a longitudinal slot 9 for a purpose soon to be described. The

arms on. the two tumblers extend towardf.

thereby while'the said members 3 of the frame do not necessarily touch the strop at all.

The .slots 9 receive the projections 10, 10

-on one end of the blade-holding plate 11,

which'is' also provided at its center at each end with a trunnion 12, which trnnnions on end bearings are loosely fitted in holes in the members 2 of the frame, so as to have free motion therein. This is important, for

by thus-having slight free motion in all llU directions the edges of the blade may always bear fairly against the strop so as to make the cutting edges straight and in line.

The plate 11 is formed near each end with a struck-up lug 13, said lugs extending toward each other as seen best in Fig. 4, and this plate is further shown as'provided with the short projections 14, to engage in the holes 15 in the blade 16.

In the form shown in Fig. I the bladeholder is designed for holding the doubleedged blades therein shown. The blade is placed in position upon the plate 11 with the holes in the blade receiving the projections 14, and then the securing plate 17 seen in Fig. 4 is placed upon the blade, one end being engaged under one of the lugs 13 by means of the open ended slot 18 at the end thereof, and then the other end of the plate 17 is swung around till its edge 19 which is slightly beveled as seen at under the other lug 13, the shoulder 21 enmovement of the plate 17. The blade will then be firmly held in position. In order to facilitate the swinging of the plate 17 into or out of engagement with the lug with which it is locked the said plate maybe provided with a slot or the like 22 into which may be engaged a suitable implement, as for instance, a knife blade, to move the plate to engage it or release it.

' In the form of blade holder seen in Figs.

(3 and 7 the construction is substantially the same as that above described except as to the form of the blade holding plate, which in this form 1 shown as cutaway at one side as seen at 23 to provide a space in which is received the thick back portion 24 of the single edged blade 25. The plate 26 is otherwise like that shown in Fig. 4, being provided with similar end lugs upon its upper face, trunnions at theends and pro;

cctions at one end for engagement in the slots of the arms of the tumblers. .The securing plate is of the same form as that shown in Fig. 4, having an open ended slot at one end and a shoulder at the other, and is applied and removed in the same way.

The mode of use will be apparent. The blade having been affixed in position in the holder the device is placed upon a strop 27 which is held at its ends in any suitable manner, and as the device is run over the strop the twotumblers will be properly turned to bring the proper edge of the blade against the strop, and in proper position, the inwardly extending arms 8 of the tumblers being connected in the manner de scribed with the blade holder, the holder is tilted and the blade brought into proper position whichever way the device may be moving along the strop. As the direction of the movement of the device upon the strop is changed the blade holder is automatically blade does not have 20 is engaged.

tilted into position to bring the other edge into operative position. After passing the device over the strop sutliciently to sharpen one of the two edges of the two-edged blade it is merely turned over in the hand and applied to the strop as before to sharpen the other side of the edges of the blade. The to be removed from the frame until both edges thereof have been sharpened. The one-edged blade is sharp encd by moving the device back and forth over the strop in the same manner. The device does not have to be moved parallel with the side edges of the strop butmay be moved so as to give a diagonal stroke so that the blade will always be held at a scientifically correct. angle so as to give a keener edge.

It will be noted that whichever way the device is being moved upon the strop one or the other edge of the blade is being abraded to form a fine edge. gaging the lug serving as a stop to limit the with said projections,

Modifications in detail may be resorted to without departing from the spirit of the invention or sacrificing any of 1ts advantages.

What is claimed as new is 1. In a stropping device, a frame, a. pivotally-mounted blade-holder mounted therein and having centrally-disposed trunnions at its ends and projections at one end, and oppositely-disposed pivoted means connected with said projections.

2. In a stropping device, a frame, a pivotally-mounted blade-holder mounted therein and hiding centrally disposed trunnions at its ends and projections at one end, and oppositely-disposed pivoted means connected said holder having blade-holding means adjacent said trunnions.

3. In a stropping device, a frame and a blade holder mounted therein ,having centrally-disposed trunnions and projections upon opposite sides of one of the trunnions and connected with means on said frame for tilting the holder backward and forward over a strop.

4. In a stropping device, a frame, a pivotally-mounted blade-holder therein having centrally-disposed trunnions at opposite ends and projections at one end, and oppositelydisposed pivoted means connected with sald projections, said holder havin integral struck-up blade-holding means adjacent said trunnions and in line therewith.

5. In a stropping device, a frame, a blade holder pivoted therein and havin centrallydisposed trunnions at opposite ent ls and rojections at one end upon opposite sides 0 trunnions, tumblers mounted n said frame and of greater diameter than the end portions of the frame, and means connectin said tumblers with the blade-holder, sai means embodying pins andslots allowing limited play for the purpose specified.

as the device is moved the I hplder pivote 10 holder ivote therein and having centrallydispose trunnions and projections upon opposlte sides of one of said trunnions, tumblers pivoted in the frame and loose pin and slot connections between the tumblers and opposite sides of the blade-holder.

7 In a stro ping device,a frame, a blade- 5 therein, tumblers pivoted in the frame and having each an arm at one end provided with a slot, with-the arms of the one tumbler extending toward those of the other, and means on opposite 'sides. of the pivot on one end of the blade-holder engaged in said slots, said device being movable over a strop-at an angle to the length of the latter. t-

8. In a stropping device, a frame, a blade: holder pivoted in said frame, tumblers mounted in the frame for partial rotationby engagement with, the strop, and projections on one end of and upon opposite sides of the trunnion of the blade-holder, and means I connecting the tumblers and said projections comprising a p 6. In a strapping devioe,'a frame,a lolade- I of the' blade-holder, whereby the latter is tilted alternately in opposite directions as the device is moved back and forth over the strop. v

9. In a stropping device, a blade-holder comprising a pivotally-mounted plate for supporting a blade and having lugs, .and a securing plate having a slot at one end and at the other a shoulder for cooperation with said lugs.

10. In a stropping device, a blade-holder and a securing plate hav ing at one end an open-ended slot and at the other, a shoulder,

-said securing plate being provided with a ate havino lugs at the ends,

slot for the reception of means for moving 40 the plate.

In-witness whereof, I have hereunto set my hand this 31stday of July, 1908, in the presence of two subscribing Witnesses.

. ..JOHN SCHNURR." Witnesses v E. B. WHITMORE, A. M. WHrrMoRn. 

